| Evaluation of functional integrity of the retinohypothalamic tract in advanced glaucoma using multifocal electroretinography and light-induced melatonin suppression. | |
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MedLine Citation:
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PMID: 20692255 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The aim of the study was to investigate the survival of melanopsin-expressing retinal ganglion cells (mRGCs) and the functional integrity of the retinohypothalamic tract in patients with bilateral advanced glaucomatous optic neuropathy by measuring the neuroendocrine light response of the pineal gland. Nine patients with bilateral advanced primary open-angle glaucoma (glaucoma group) and nine normal control subjects (control group) were included in this pilot observational, prospective, case-control study. The best-corrected visual acuity logMAR, standard automated perimetry mean deviation, and the retinal nerve fiber layer thickness determined by optical coherence tomography and multifocal electroretinography were used to evaluate the changes. Melatonin was analyzed in the saliva by radioimmunoassay before and after exposure to bright light (600 lux) for 60 min at night. The advanced glaucoma group did not have any significant nocturnal melatonin suppression after exposure to bright light (14.28 ± 3.07 pg/ml pre-light melatonin concentration vs. 15.22 ± 3.56 pg/ml after light exposure; p = 0.798) unlike the marked melatonin suppression in the control group (22.43 ± 4.37 pg/ml pre-light melatonin concentration vs. 11.25 ± 1.89 pg/ml after light exposure; p < 0.002). Response density estimates by the scalar product amplitude measure for the interval 0-80 ms of the first-order kernel responses were similar in both groups, indicating that outer retinal function was significantly unchanged in the glaucoma group (5.95 ± 0.54 nV/dg^2) compared with the control group (6.20 ± 0.22 nV/dg^2) (p = 0.689). Our findings are consistent with the interpretation that the rhythmic secretion of melatonin was affected in advanced glaucoma, suggesting that attention should be paid to non-image-forming visual functions, such as control of circadian rhythm and the clinical impact in patients with glaucoma. |
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Authors:
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Consuelo Pérez-Rico; Pedro de la Villa; Ignacio Arribas-Gómez; Román Blanco |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-08-06 |
Journal Detail:
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Title: Experimental eye research Volume: 91 ISSN: 1096-0007 ISO Abbreviation: Exp. Eye Res. Publication Date: 2010 Nov |
Date Detail:
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Created Date: 2010-10-22 Completed Date: 2010-11-05 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0370707 Medline TA: Exp Eye Res Country: England |
Other Details:
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Languages: eng Pagination: 578-83 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 Elsevier Ltd. All rights reserved. |
Affiliation:
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Department of Ophthalmology, University Hospital Principe de Asturias, University of Alcalá, Alcalá de Henares, Madrid, Spain. cinta.perezrico@gmail.com |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Aged Case-Control Studies Cell Survival Electroretinography Female Glaucoma, Open-Angle / metabolism, physiopathology* Humans Light* Male Melatonin / metabolism* Middle Aged Optic Nerve Diseases / metabolism, physiopathology* Perimetry Pineal Gland / metabolism, radiation effects* Prospective Studies Radioimmunoassay Retinal Ganglion Cells / physiology* Rod Opsins / metabolism Saliva / metabolism Suprachiasmatic Nucleus / metabolism, physiopathology* Tomography, Optical Coherence Visual Acuity / physiology Visual Fields / physiology |
| Chemical | |
Reg. No./Substance:
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0/Rod Opsins; 0/melanopsin; 73-31-4/Melatonin |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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